MT8950

Features:

• Transparent coding and decoding of 0 to 8, 9.6  and 19.2 kbps data
• Coding compatible to PCM voice channels at 56/64 kbps in ST-BUS format
• Automatic line polarity detection and correction
• Loopback facility for test purposes
• Selectable data formats: RZ or NRZ
• Eight user selectable modes of operation
• Low power ISO-CMOS technology


Application

• Transparent coder/decoder for synchronous and asynchronous data
• Data terminal (RS-232C, etc.) to ST-BUS interface
• Data switching on digital PBXs
• Channel banks/TDM multiplexers


Pinout




Specifications

	Parameter	Symbol	Min	Max	Units
1	Supply Voltage	VDD	-0.5	7.0	V
2	DC Output Voltage	VIN	VSS-0.3	VDD+0.5	V
3	DC Output Voltage	VOUT	VSS-0.3	VDD+0.5	V
4	Input Diode Current ( VI <0 or VI >VDD)	IIK		±10	mA
5	Output Diode Current ( VO<0 or VO>VDD )	IOK		±20	mA
6	DC Supply or Ground Current	IO	-65	±25	mA
7	DC Supply or Ground Current	IDD/ISS		±50	mA
8	StorageTemperature	TST		150	oC
9	Package Power  Dissipation (CERDIP) TA= 25o C	PD		1.0	mW

Description

The MT8950 is a coder/decoder which uses the Transition Encoded Modulation (TEM) technique for encoding/decoding low speed data to and from a 56/64 kbps channel (equivalent to PCM Voice).  The coding and decoding scheme of MT8950 is tr-ansparent and can accept either synchronous or asynchronous data up to 8 kbps (inclusive); at 9.6 kbps and 19.2 kbps. 

The MT8950 is fabricated in MITEL's ISO-CMOS technology.